Spatial and seasonal variations of atmospheric N2O and CO2 fluxes from a subtropical mangrove swamp and their relationships with soil characteristics

► We investigate the spatial and seasonal fluxes of N2O and CO2 in Mai Po mangrove. ► Both gases fluxes are significant and show large spatial and seasonal variations. ► Soil NO3−-N and TP increase N2O flux. ► Soil OC and TP concentrations contribute to the CO2 flux. ► N2O emission is probably due to soil denitrifcation.